User Manual

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AS4000 Release3 and Release 4 Central

Terminal Installation and Commissioning

DLP-017

605-0000-432

Issue 1.3a Date 18th October 1999

Page 2 of 6

b) Select the modem shelf to be tested. Disconnect the 2Mbit/s feeds to the shelf

2Mbit/s IN and 2Mbit/s OUT connectors on shelf interface connections located at

the right hand side of each Modem Shelf.

c) Disconnect the Sitespan cables from the 25 way EM/Sitespan port on the modem

backplane

d) Set up Sitespan with an empty database Set the modem shelf properties (Shelf

Frequency and PN codes) to the same as the existing modem shelf. Failure to do

this will result in Sitespan overwriting the shelf controller with its last set values.

e) Connect Sitespan to the 25 way EM/Sitespan port on the modem backplane

f) Select a modem channel for the test. (The modem channel selected should be one

that has an existing subscriber.

g) Switch rack off by placing both breakers in the off position. . This involves loss of

service to all users. Steps should be taken to minimise disruption by completing

the set-up quickly

12. Test TX Output Power. (Test 5)

This section describes the measurement of TX output power.

a) Disconnect the antenna.

b) If measuring the power output on shelf 1 and/or 2 connect the Power Meter to the

N-Type connector on DIP/LNA1 or to the antenna port of the coupler if fitted at the

top of the rack ready to measure the power output from shelves 1 and 2

c) If measuring the power output on shelf 3 and/or 4 connect the Power Meter to the

power meter to the N-Type connector on the TX filter card as shown in Figure 36.

or to the antenna port of the coupler if fitted

POWER

METER

15W

Termination

RF Power meter

connection when

measuring Modem

Shelves 1 & 2

TX Output Power

DIP/LNA1 TX Filter

15W